Facing-tool for dressing valve-seats, &amp;c.



T. B. WILLIAMS & F. L SMITH.

FACfNG TOOL FOR DRESSING VALVE SEATS, &c. APPLICATION FILED JAN. 23,I915.

L227,5 1 3 Patented May 22, 1917.

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T. B. WILLlAlVlS & F. L. SMITH.

FACING TOOL FOR DRESSING ALVE SEATS, m.

APPLICATION FILED JAN.23. 1915.

Patented May 22, 1917.

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T. B. WILLIAMS & F. L. SMITH.

FACING TOOLFOR DRESSING VALVE SEATS, &c.

APPLICATION FILED JAN.23. I915.

L22?,51 3... Patented May 22, 1917.

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THOMAS B. WILLIAMS, OF ORANGE, MASSACHUSETTS AND FRANK L. SMITH, OFCHICAGO, ILLINOIS, ASSIGNORS TO THE LEAVITT MACHINE COMPANY, OF QRANGE,MASSACHUSETTS, it USEIGIltR-JIQN OF MASSACHUSETTS.

FACING-TOOL FOR DRESSING VALVESEATS, 8w.

Application filed January 23, 1915.

b all whom it may concern:

Be it known that we, THOMAS B. TIL- LIAMS and FRANK L. SMITH, citizensof the United States, and residents, respectively, of Orange, in thecounty of Franklin and State of l fassachusetts, and Chicago, in thecounty of Cook and @tate of Illinois, have invented certain new anduseful Improvements in Facing-Tools for Dressing Valve-Seats, &c., ofwhich the following is a specification.

This invention relates to a facing tool for dressing valve-seats, etc,and particularly to a tool adapted for recutting valve-seats, etc, thathave become worn or pitted as a result of long use, this class of toolsbeing of a ype especially adapted for attachment to valve-casing andrefacing a valve-seat in a pipe-line, or other location in situ.

In the patent to Morse, No. 29,939, granted June 10, 1890, there isdisclosed a type of tool for recutting valve-seats, etc., in which thegeneral direction of the tool is lengthwise of the axis of the cutter.In a prior patent granted to us June 41., 1912, Yo. 1,028,295, there isdisclosed a type of facing tool in which the general direction of thetool is transverse to such cutting axis, but in the tool of said patentthe device is designed for attachment to a single resistance pointoutside the tool, via, a valve seat or other surface of the work. Insaid patent and in our prior Patent No' 1,012,926, granted Dec. 26,1911, the tool has a universal connection with its operating means forthe purpose, more particularly, of adapting it for the cutting ofsurfaces disposed at an acute angle to the axis of one of the elementsof the universal connection, and especially to permit it to operate uponvalve-seats disposed at an acute angle to each other, a type ofconstruction common to gate-valves for the refacing of which said toolsare particularly adapted.

In a companion application filed by us January 2 :3, 1915, Serial No.3,897, there is disclosed a type of valve-facing tool espe ciallyadapted for use in connection with the valve-seats, etc, of gate valvesin which the general direction of the tool is transverse to the cuttingaxis and which operates against or between two fixed resistance 70iD ZSor surfaces lying wholly outside the tool, that is, two fixed points orsurfaces of Specification of Letters Patent.

Patented May 22, 1917..

Serial No. 3,899.

the work or article to which the tool is attached. In said tool there isretained as an important feature of the construction particularlyadapting the tool for use in recutting valve-seats disposed at an acuteanto each other, a universal connection. in another companionapplication filed by us January 28, 1915, Serial No. 3,898 which.involves in the main an extension of the principle disclosed in ourapplication last referred to, there is disclosed a facing tool 0% ,iesame general type, that is to say, one having a general directioncrosswise of the cutting axis, and also preferably having a universalconnection between its two main parts, but which is adapted for a widerrange of usefulness through the employment of certain movements andadjustments which permit the tool to cooperate properly withvalve-seats, etc, disposed farther apart (and at various angles to eachother) than the valve faces for which the tool disclosed in the first ofour said companion applications is adapted. The principal feature of thesecond of our companion applications is a cutter-bar or lever jointed orotherwise so formed as to permit a. change in the general direction ofthe cutter-bar or lever, and particularly of the inner face thereofnearest the cutting tool, this change of general direction preferablyresulting from using a cutter-liar or lever having pivotally connectedmain and auxiliary sections one of which carries an element of theuniversal connection between the two main parts of the tool and alsoembodies the load and power points of said lever, while the othersection, preferably a yoke shiftable to different an lar relations tothe main section, preferably embodies the fulcrum of the lever. Thetool. of said second appli cation. also embodies means for shifting themain and auxiliary sections of the cutterhar or lever relatively to eachother, and for adjusting the position of one element of the universalconnection (and hence of the load-point of the lever which is embodiedin said element) in a direction to change the leverage, this adjustmentbeing for the purpose of permitting the tool to cooperate properly withvalve-seats, etc., of different diameters. Said application alsodiscloses provision for shifting this element of the universalconnection crosswise of the cutter-bar or lever to vary the distancebetween the two main elements of the facing tool.

In the tool of said last mentioned application, however, the adjustmentof the angular relation of the two main members of the cutter-bar orlever is somewhat diflicult to make as all the parts controlling theadjustment lie between the valve-seats in the valve casing when the toolis in operative relation with such a pair of valve-seats Moreover, forthe same reason, the vertlcal adjustment of the position of theload-point of the lever and of that element of the pivotal or universal.connection for the cutter which is carried by the cutter-bar is alsosomewhat difficult to make. In addition to this the range of crosswiseadjustment of said pivotal or universal connector is limited, it beingsomewhat less than the length of said connector itself. D

The principal object of the present 111VG11' tion is to provide a toolhaving a main ele ment the general direction of which is pref erablycrosswise to the cutting axis, in which the adjustment of the generaldirection of said element and of the position of the connector andload-point just described may be changed as desired from a point outsidethe work and preferably from a point at or near the extreme outer orupper end of said main element of the tool. Any suitable means foraccomplishing these results may be employed but the connectlons willpreferably be carried wholly by the main element of the cutter-bar orlever before mentioned.

Another important feature of the invention consists in employing as oneelement of the pivotal or universal connection between the two mainparts of the tool, an extensible element by means of which aconsiderable increase in the relative distance between the cutter andcutter-bar of the tool. may be obtained as compared with the maximumseparation possible with the corresponding means disclosed in theaforesaid applications.

In the foregoing the main features that distinguish the presentimprovements from the devices of our aforesaid companion applicationsare set forth. Various more spccific features of the present inventionwill be hereinafter set forth in detail and are illustrated in theaccompanying drawings, in which,

Figure 1 is a sectional side elevation of a facing tool embodying thepresent invention in operative relation with a pair of parallelvalve-seats;

Fig. 2 is an end elevation of the device shown in Fig. 1 looking fromthe right in said figure toward the cutter-bar of-the tool;

Fig. 3 is an enlarged broken elevation partly in section of thecutter-bar and parts carried thereby looking at the inner face of saidbar;

Fig. at is an enlarged broken elevation of the same, lookin at the outerface of said bar;

Fig. 5 is a broken edge elevation of the same, and

Fig. 6 is a vertical section and elevation of the lower end of thecutter-bar and parts carried thereby, these being disposed in the samepositions as in Fig. 5.

Similar characters designate like parts in all the figures of thedrawings.

As before stated, the tool of the present invention is preferably onemade up of two main parts connected by a pivotal or universal joint anddisposed in a general direction transverse to the axis of the cutter,and adapted for operation while engaged with a plurality of resistancepoints or surfaces lying outside the tool, that is, lying in the work orits equivalent. One of the principal objects in constructing a facingtool in this manner is to adapt it to be inserted into and work incomparatively small spaces. Reduction of the thickness of the toolwherever this can be done without sacrificing strength, etc., is amatter of importance. The tool of the present application in addition tobeing distinguished from the tools of our aforesaid applications in therespects noted, is also one in which the cutter-bar or lever has aminimum thickness so as to take up the minimum amount of space between apair of valveseats, etc., with which it is intended to cooperate. As tothe other main element of the too], this, as in our aforesaidapplications, has also preferably a rotary cutter operated by aratchetfeed lever connected thereto in such a manner that the ratchetfeed cutter as a whole also occupies the minimum amount of spacecrosswise, that is, in the direction of its thickness. hen two such mainelements are brought together for cooperation it will be seen that they.will occupy the minimum amount of space and will therefore be capableof operation upon valve-seats, etc., spaced a com paratively shortdistance apart. When two such main elements are brought together andtemporarily connected by a universal joint or ball-andsocket connectionin the manner disclosed in our aforesaid applications, to face two suchvalvo-seats lying close together, the presence of means for changing thegeneral direction of the cutterbar or lever and varying the position ofthe element of the universal connection carried thereby becomes a matterof much importance, as the space between the seats is insuflicient topermit the user of the tool to make these changes of position, oradjustments, readily, and in some cases the making of the necessaryaugustments will be found extremely diilicult. The means employed in thetool of the present appli cation makes it easy to obtain the necessaryangular setting of the members of the cutter-bar and the desiredrelocation of the cutting axis and loadpoint.

The two main eleinci tool may be of any sun crnstruction coming withinthe fore discl sure. They are preferably a ratchet-reed cutter of anysuitable type, such as '1 a cutterbar, preferably a cutter-sin form of alever such as JO main elements of the tool will y llztf, a face-to-faceconnection. ball-anilsoclret joint, for p les eady connection anddisconnection therec; by movement in substantially a straight line. Thisconnection permits one of these main elements to be inserted in theopening l'ietiveen a pair of valve-seats in a casing-head in advance ofthe other and the second member afterward inserted and the complementarybearing elements then nrcperly as sociated. as by merely insuring theball part 2 into the socket 3 after the two ele ments have been locatedsubstantially in working position between a of opposed resistancesurfaces such as the valve-seats. r and r, of easing C. Such a universalconnection as this permits relative tipi of the parts A and B to enablethe cu g edges to face surfaces widely varying angles.

The element A is preferably a ratchet-feed cutter comprising a lever, Z,a cutter proper, c, and a ratchet-feed connection between said lever andcutter for converting oscillating movement of the lever about thecutting axis into a step-by-step rotation of the cutter proper. Thiscutter 0 preferably has a multiplicity of cutting blades or cuttersproper, 0, so constructed and so disposed about the axis of the cutter cas to operate upon the surfaces to be faced with a scraping rather thana cutting action, as set forth in our aforesaid patents. The specificfeatures of novelty of this ratchet-feed cutter constitute the subjectmatter of a separate application iiled by us January 1915, EBerial No.3900, and will not be described in detail herein.

The main element B of the present tool is preferably a bar to facilitateits insertion down into the valvccasing- G to the desired point and itsproper manipulation to bring it to the working position in operativerelation with the element A. The construction sh own is one in which thebar forms a support for the cutter and constitutes a lever the fulcrumof which is a point of contact with the resistance surface or valve-seatwith which it cooperates. Ordinarily the two members A and B will engageand work between resistance points or surfaces such as M- a wil lgienonor and r and will have such a relative movement toward and away from eachother as to be readily releasable from said surfaces as well as movableinto clamping engagement therewith, this being due to relative spreadingof these two main parts and their consequent reaction a against theopposed resistance surfaces between which they work. The fulcruin of thelever is substantially at the lower end of the outer face thereof, thatis, it is the point of contact of said lever with the corrcspondin rsistance point or surface 1 h which it coiipcrates. This lever in adi tosupporting the cutter has other impel furictions one of the principalones being hat of feeding the cutter up to the work, said feedingmovement in the present case being a slow and gradual swinging movementof said lever about its fulcrum towarc the left in Fig. 1.

As in the case of the tool of the second of our aforesaid companionapplications, the cutterbar or lever B of the present invention is somade, preferably by, being minted, that the elements thereof may changetheir relative angular positions. Here, as there, the preferredconstruction is one in which the cutter-bar or lever is made up of twopivotally connected elements one of which is the main section, b, andthe other of which is an auxiliary section preferably in the form of ayoke, 3 pivoted to the main section 6 near the end. thereof. This pivotis indicated at 4 and may be of any suitable type.

one of these two main elements, in this case the section Z), is intendedto contain the loadpoint of the lever, while the fulcrum-point islocated in the other element. to wit, in the auxiliary section or yoke 1Here the power point of the cutter-bar or lever is also intended to belocated in the main section 5, it be iiig shown as in an elementadjustable lengthwise of said main section the main part shown for thispurpose being an adjustable screw-stud, 5. movable in a main guide-slot,6. which here extends from a point near the upper end of the section bto the lower end thereof and intersects said lower end. This screw-studis intended to be clamped inplace in any adjusted position len hwise ofthe part b, as by means of a clamping lever, 7, ou the threaded portionof the screw-stud 5, which in turn is shown as projecting from andpractically forming a. part of a slide-block, 8, substantially "i shapedin cross-section movable up and down on the ways formed by theguide-slot 6, a washer, 9, being interposed between said clamping leverand the outer face of the part 7) to increase the area of the surfacegripped. By means of this construction the stud 5 may be located andheld securely in any desired vertical position. As in our priorapplications aforesaid, the screw-stud 5 forms at its extreme outer endthe power-point of the lever B to which pressure is applied forimparting feed movement to said lever and through it to the cutter 0 tofeed the latter up to the work. This feed movement may be produced invarious ways, a suitable feed device, such as F, being shown ascooperating with. the lever B at the power-point of the latter for thispurpose. The feed device 7 l? is detachably connected to the flangedportion, 10, of the valve-casing G in a wellknown manner, as byclamp-screws, 11. As in our companion cases, the main element of thefeed device is a feed-screw, 12, having a knurled head, 13, and a cuppedinner end for cooperation with the power-point of the lever B. Theadjacent surfaces of the feedscrew and the power-point of the lever Bare so shaped as to cooperate properly in all relative positions of theparts, that is, at all angles which they may make as the feedprogresses. Because of this end contact which these devices make thefeed device and the tool. as a whole are as readily separable as are thetwo main elements A and B of the tool proper by disconnection at theball.- joint 23. Moreover, disconnection takes place by a movement in adirection substantially parallel with the direction of movement fordisconnecting said ball-joint. The principal object of providing foradjustment of the position of the power-point of the lever B is toenable said lever to cooperate properly with valve-seats, etc, ofdifi'erent diameters, this adjustment being necessary in any tooladapted to operate on valveseats differing considerably in diameter. Theadjustment shown provides for a considerable range of action of the toolin this respect.

As before stated, one element of the pivotal or universal connectionbetween the elements A and B is carried by the part B near the lower endthereof, that is, near the fulcrum of the lever B. The load-point ofsaid lever is in this pivotal element, which is therefore a lever of thesecond order. For the reason set forth in connection with the shiftingof the power-point it is desirable to provide for shifting theload-point also, and in the construction shown this is accomplished in amanner similar to that described in connection with the power-point.Here the ball element 2 of the pivotal or universal connection betweenthe main parts A and B of the facing tool is at the inner end of athreaded screw-1')ost, 7), slidable through a slide-block, 1.4, movableup and down in a guide-groove G of the main section B of said lever nearthe lower end of said section. llhis slide-block is substantiallysimilar to that illustrated in our aforesaid applications, it beingsubstantially T-shaped in cross-section and suitably bored to receivethe screw-post 7). This post in turn has a pair of knurled nuts, 15 and16, on it which with said pest control another important function of thetool, to wit, the preliminary relative adjustment of the two mainelements A and B at the proper distance apart for coaction withvalve-seats spaced at different distances apart. necessary in order togive the tool any considerable range of action in this respect. In thesecond of our aforesaid companion applications the desired adjustmentwas obtainedby simply sliding this post to the proper position and thenproperly locating the two nuts on it and jamming said nuts. In thepresent case, however, the scrcw-post 7) is not, as in our aforesaidapplications, a single element unchangeable in length, but is anextensible element made up in this instance of two parts which aresubstantially telescopic and one of which is the solid post 79 and theother of which is a tubular post, 7 integral with the knurled head 16.Moreover, the slide-block 14 through which the part 29 passes is cutaway in such a manner as to provide sufficient space for that portion ofthe member 7? which extends inwardly from the inner face of the knurlednut ii"), in order that said clamp-nut may always be able to engage theouter face of the section Z). When it is desired to utilize the fulllength of the pivot element 79 j) the part 16p which is internallyscrew-threaded to cooperate with the external threads of the part ,7),is unscrewed to extend the knurled head 16 thereof as far as possiblebeyond the point end of the post 79 after which the nut 15 is turned tocarry it to the right in Fig.

far enough to jam against the inner face of the section 7) of thecutter-bar. In this position the ball-head 2 of the connector isprojected its maximum distance inwardly and is positioned to cooperatewith valveseats spaced substantially the maximum distance apart. In thiscase, as in our aforesaid applications, the screw-post p is intended tobe held against turning movement and has a longitudinal groove orkey-way cut in the surface thereof to receive corresponding pin or keyin the bore passing transversely through the slide-block, as will beobvious.

The vertical adjustment of the ball-head and screw -post, that is, theadjustment lengthwise of the main section 7) of the lever, is intendedin this case to be effected from a point on the tool outside and clearof the work, preferably from the extreme outer or upper end of thecutter-bar or lever B. The connections employed for this purpose may beof any suitable type. Here connection to the slideblock 14. may be madein a manner substantially similar to that described in our aforesaidcompanion applications, that is, by a feed-screw adapted to turn butsuitably held against longitudinal move ment relative to saidslide-block. Said feedscrew, however, is distinguished from that Thisadjustment is i of our aforesaid applications in that it extends to apoint outside the work where it can be readily manipulated by theoperator and has suitable provision associated therewith for suchmanipulation. The preferred construction is one in which a feed-screw,17, threaded for a considerable distance at its lower end, extendsupward unthreaded through the upper end of the main portion 1) of thecutter-bar or lever and at or near its extreme upper end has a knurledhead, such as 18, for turning the rod. This rod, as illustrated, isdisposed along the longitudinal axis for the cutter-bar B and is in themost favorable location for readily acting upon the slide-block 14: toraise and lower the ball element 2 of the universal connection, andhence the load-point of the lever which load-point is embodied in saidballhead. The connection between the threaded lower end of the rod andthe slideblock here comprises a set-screw 19 passing transverselythrough the upper inner wall of the slide-block 14 and into engagementwith a short sleeve, 20, surrounding and free to turn on the reducedlower unthreaded end of the screw-rod 17, a stop-collar being shown at21 on the lower end of said feedscrew or rod and pinned thereto tomaintain the connection between said screw and slide-block, whilepermitting relative turning of the screw. The threaded portion or screwproper of this screw-rod passes through a correspondingly threadedvertical bore at the longitudinal axis of the element Z), this threadedopening being in a cross-piece, 22, held in place in any suitablemanner, as by means of screws, 23. The main element 6 of the levercomprises in this case as its principal parts two parallel bars which inthis instance are connected by the cross-piece or block 22 justdescribed and by a similar cross-piece or block, 24:, at the upper endof the part b, the cross-bar or block 24 being also shown as held inplace by screws, 25, in a manner similar to the block 22. Bothcross-pieces or blocks 22 and 24: are shown as set into recesses in theinner faces of the two parallel bars of the main section Z) of thecutter-bar or lever. The feed-screw or rod 17 is guarded in acylindrical bore in another element (hereinafter to be described)passing through the cross-bar or block 24 and is threaded through theinternally threaded bore in the lower crossbar or block 22 from whichits feed movement is derived. It will be evident that by turning theknurled heed 18 in one direction or the other the element 2 embodyingthe load-point of the lever and also the center of connection with thecutter may be shifted to any desired position lengthwise of thecutter-bar and held by the engaging screw-threads in any position towhich it is shifted; and that this result is produced by devices locatedwholly on the main section b of the element B.

In addition to the devices just described for shifting the load-pointand the powerpoint of the lever, means are also provided, as in thesecond of our aforesaid companion applications, to adapt the tool forcoopera- ,tion with valve-seats, etc., disposed far apart and at widelyvarying angles to each other from parallelism to an acute angle ofconsiderable size. The means employed is a cutter-bar or lever made upof sections, one of which is shiftable to different positions crosswiseof said bar or lever, preferably to different angles to the other part,in which adjusted positions it will be held when in use. Here thecutter-bar or lever B is made up of a main section b and an auxiliarysection preferably pivoted thereto. The cutter-bar or lever B is locatedin one direction by contact of the outer face of the auxiliary sectionor yoke thereof with the resistance surface such as 1 with which itcooperates, that is to say, by engagement of the outer side of the lowerend of this auxiliary section or yoke with a resistance surface at thefulcrum-point of the lever, this fulcrumpoint being, as in the second ofour aforesaid applications, in the auxiliary section or yoke and not inthe main section of the element B.

In use it is necessary to locate the element B transversely of thecutting axis and preferably in such a manner that it will have notendency to turn about its axis. As in our aforesaid application, thepositioning of the element B lengthwise results from the use of one ormore stop-pins, such as 8, projecting outwardly from the auxiliarysection or yoke y near the lower end thereof and adapted to engage thecircular inner wall of the valve-seat shown. There will usually be aplurality of these stop-pins, and these in the construction showncooperate with a third point at the opposite side of the cutting axis,which third point is in the main section Z) of the element B and islocated at the power-point of the lever. Thus at least three fixedpoints of location are provided for preventing lengthwise movement ofthe element B and also for preventing relative turning movement ofthesame about the cutting axis, these points forming preferably the cornersof a triangle. By means of these elements for locating the cutter-bar orlever in a direction transverse to and circumferentially of the cuttingaxis, and by means of the contacting faces at the fulcrum of the lever,the element B is located against movement in every direction excepttoward the cutter and movement in that direction is intended to takeplace (after the parts have been set in position between the surfaces 1"and r) only as aresult of the inward advance of the element B turningabout its fulcrum on the application of power near the upper endthereof. By providing such a cutter-bar or lever having main andauxiliary sections shiftable in the manner before described relativelyto each other, the general direction of said bar or lever may be variedwithin quite wide limits to enable this bar to cooperate properly withthe element A whether the resistance surfaces are far apart or closetogether and parallel with each other, or disposed at a considerableacute angle with respect to each other. The universal or ball-and-socketconnection between the two main elements A and B of course permits theproper cooperation of these elements when tipped at a considerable acuteangle to each other. The particular angular position to which thesections of the main element ll will be set in any given case will ofcourse depend upon the nature of the resistance surfaces with which theelements A and B are intended. to cooperate.

In order to locate the cutter-bar and hold it properly in all angularpositions to which the auxiliary section or yoke 1 may be tipped, thestop-pins s are preferably tapered inwardly so that they may grip thecircular inner walls of the valve-seats r and r properly in all. angularrelations of the main elements of the tool, as cylindrical pins do notcooperate well with these an nular seats in all such positions. in somecases the valve-seats to be faced have inwardly projecting lugs some oneof which may lie in such a position as to interfere with one of thestop-pins s and prevent the proper location of the tool unless someprovision is made for avoiding such interference. For this reason thestops are preferably adjustable transversely of the auxiliary section oryoke i there being in the construction illustrated one adjustable pin ateach side of the longitudinal axis of the yoke which pin may be locatedin any one of three holes, 26, in the cross-bar of the yoke. In case ofinterference between any stoppin and such a lug it is only necessary toshift such stop-pin from the hole which comes opposite the lug to thehole which is clear of it and the stop-pin will then engage the annularinner surface of the valve-seat properly.

The yoke g is shown as supported on the main section b of the element B,as by means of pivot-screws f, the axis of connection being adjacent tobut transverse to the cutting axis, and hence the axis of connection isalso close to the load-point of the lever. This yoke is preferably soshaped and so combined with the main element of the cutter-bar tl at thelower end or short arm of the main section 7) extends into the yoke andbeyond the load-point of the lever and close to the fulcrum thereof,that is,to a

point adjacent to the cross-bar at the lower end of the yoke. Normallythis yoke is substanti ally in a straight line with the main section bof the element B but it is adapted to be shifted to different positionscrosswise of said element for the purpose of adapting the tool forproper and easy cooperation with valve-seats disposed at differentdistances apart and at various angles. In the tool of the second of ouraforesaid applications the means for adjusting this auxiliary section oryoke in its various positions and holding it there is located near thepoint of connection of the main and auxiliary sections of the elementll, and the means used is such that it is not only difficult to get atwhen the facing tool is in positir a between a pair of valve-seats, butit also takes up considerable space crosswise of the tool and byprojecting into the path of adjacent surfaces of the work reduces to aconsiderable extent the range of action of the tool.

The tool of the present application has means for adjusting the relativepositions of the sections of the element B conveniently and from a pointoutside the work and without reducing the capacity or range of action ofthe tool by interference with other parts of the work; and the meansemployed. is also effective for maintaining any adjustment that may bemade. The preferred means for bringing about the noses sary relativemovements between the two' sections of the element B, that is, forshifting the yoke 3 in the construction'illustrated to various angularpositions with respect to the element Z), preferably extends from apoint at or near the extreme upper or outer end of the element B alongthe main section Z) lengthwise thereof into po sition for propercooperation with said yoke; and this means is also preferably lo catedwithin, or substantially within, the inner stead of projecting aconsiderable distance outside of one of said faces as in the ad justingmeans of our second aforesaid application. The means for o ierating saidyoke from a point outside the work may be any suitable for the purpose;A desirable means for effecting the necessary shifting movements isillustrated herein and comprises as its essential elements a slide, suchas S, mounted on and movable lengthwise of the main section b of thecutter-bar, and suitable means, such as a screw-feed device, forshifting the slide lengthwise of the section Z) and holding it in anyposition to which it may be shifted. The slide S illustrated is aslide-frame here made up of two side-pieces, 27, and a cross-bar, 28, atthe upper, that is, outer, end of the element B of the tool. This slideconstitutes a frame slidable on the main section b of the element B, itbeing guided in this instance by and outer faces of the element B in Vinwardly extending pins, 29, working in milled gui(le-.vays, 30, in theopposite outer edges of the element o near the upper end thereof, and bythe smooth shank portions of the pivot-screws l, said side-pieces 2'? ofthe slide-frame S being slotted lengthwise at 31, adjacent to saidscrews 4 to permit the necessary movements. in the constructionillustrated a right-line movement, to wit, that of the slide-frame S, isconverted into a movement in a diflerent direction of the auxiliarysection or yoke y, here into a swinging movement about the pivots 4. Theconnections for accomplishing this may be any suitable for the purpose,but are illustrated as embodying a pair oi camslots, 32, in the lowerends of the side-pieces 27 of the slide-frame, these cam-slots beingobliquely disposed (see Fig. 5)v and adapted to receive a pair of pins,such as 34 m:- tending into the cam-slots from the inner faces of theyoke 2 near the pivot of movement of said yoke. t will be noticed thatthe means for translating the right-line movement of the slide into theswinging movement of the yoke is disposed in all relative positions ofthe parts Z) and y between the inner and outer faces of the part I), andthat this is true also of every portion of the slide-l -ame S, that isin the Zone of the work, so that there is no projection from any portionof the means for shifting the yoke 2 to engage any part of the work andreduce the range 01 sidewise movement of the element B. As will be seen,the slidelt'rame S shown extends to the extreme upper or outer end ofthe element B (and indeed constitutes in eilect one element of thetwopart frame that forms the main section b) and at said upper or outerend has a feed device for shifting the slide-frame S to difterentpositions lengthwise of the main element of the part b. This feed deviceis designated generally by f and preferably is a feed-screw associatedwith the slide-frame S and the section b of the cutter on which saidslide-frame is mounted in such a manner as to be operative for feedingsaid slide S back and forth on said section 7). Here this feed device isa longitudinally bored feed-screw, 35, working in a threaded opening inthe cross-bar t at the upper end of the part b, said teed-screw beingshown as having a smooth cylindrical shank where it passes through thecross-bar 28 of the slide-frame S and as held against longitudinalmovement on said slide-frame by means of a stop-collar, 36, pinned tothe smooth portion of the shank of the feedscrew, as indicated at 37.lhis connection, as will be clear, is similar to that for con nectingthe feed-screw 17 and the slideblock it for shifting the cutting axis ofthe tool and the load-point of the lever It will be noted that the longcylindrical shank the slide-block la is slidable in the centrallongitudinal bore of the hollow 'leed-screw 35 for the slide-i rame Sand that the two feedscrews, though separately operative for bringingabout, each independently of the other, the operation oi the partscontrolled thereby, are disposed concentrically with a commonlongitudinal axis, which also that of the element B itself. Theteed-screw f preferablyihas a knurled head, 38, similar to the knurledhead 18 on the feed-screw 1? and located adjacent thereto, both beingthus in a convenient position for no a nipulation and each near theother. The construction is such that the necessary adjustments of theparts controlled thereby may be readily made from the most convenientpoint in the tool, to wit, the extreme upper or outer end thereoffarthest away from the work, and these movements are controlled with thegreatest nicety and precision. An important advantage resulting from theuse of these screw-feed devices is that the parts controlled thereby, towit, the cutting axis v and load-point on the one hand, and the angularposition of the yoke on the other, are held by the engagingscrew-threads positively in any position to which they may be shifted.

It will be seen from the foregoing descrip tion that the principaladjustments required at the work for locating the tool with pro cisionwith respect to the surfaces to be refaced are of parts adjustable inposition from a point wholly outside the work and from the mostadvantageous position. Moreover, it will be seen that though thedifferent operating connections for effecting these principaladjustments are specifically quite different, each of the operatingconnections embodies a slide coi'itrollii'lg the point or member to beadjusted, and a screwteed for shifting that slide and maintaining it inany position to which it may be moved; and further that whollydi'llerent elements and movements affected by these respectivescrew-feed-operated slides are controlled from substantially the samepoint and by "devices located wholly on the main. member of thecutter-bar or lever B and having a common longitudinal axis coincidentwith that of said element 5. In addition to this it will be seen thatfrom these controlling points disposed in the most favorable locationoutside the work, to wit, at the knurled heads 18 and 38 at the centerof the outer end of the element B, movements are effected which bringabout a change in the relations not only of the cutting axis lengthwrseot the tool, and of the relative position of the point of contact of theball-and-socket connection with respect to the resistance surfaces withwhich the tool is intended to co act, but also of the load and fulcrumpoints of the lever B with resi iect to each other both lengthwise andcrossavise ot the lever, and also of the load, fulcrum and power pointsoil. said lever relatively to one another both lengthwise and crosswiseo'l said lever through the lengthwise adjustment oi? the load-point andthe crosswise adjustment of the fulcrum to diilerent angular relationswith respect to said load and power points. Through these variousadjustn'ients, all controlled from a common point, ch ia'es in therelations of the most vital ioints i the tool, to wit, the load, fulcrumand powe points (and through the load-want the location of theball-jointalso) are eit'ected with an case and accuracy dillicult to obtainheretofore by an inexperienced workman or from a point not locatedwholly outside the work.

it will, be noticed til at all of the operating parts on the part ll arecentered as far as possible with respect to both the llatwise and thecrosswise plane of the element Z), and are confine; as tar as possiblesubstantially within the limits ol. the four outer walls of the sectionZ) and the relatively thin side walls oil? the slide-frame lhoshift-able power-point, for example, it will be seen, is locatedsubstantially at such center, the slide-block 8 carrying the sliiittablepowerpoint having a. longitudinal here through which the smooth or shankportion (and indeed the threaded portion when necessary) ot theteed-screw 17 is tree to slide and turn without engaging the walls oilthe bore in said slide.

it will oi course he clear that all of the points controlled by theknurled heads 18 and 38 may be sin'uiltaneously shifted when desired, asit is possible for the operator to 40 turn both of these knurled headsat the same time it he wishes to do so. As the range of vertical. shit'toil? the load-point is very considerable and a correspondingly wideangle of adjustment of the yoke e is obtainable in the constructionillustrated, it will be clear that the cuttei.'-bar may be adjusted forproper cooperation with valve-seats of widely varying diameters disposedat widely varying distances apart and also at widely varying angles withrespect to each other, irom parallelism to the maximum within the limitsthe tool. in all. positions the main sections are lZQP't close toparallelism with the valveseat or resistance surface with which thecutter-bar cooperates, and hence the axis 0:1": the hall element of theuniversal connection is also kept as near normal as possible.

A tool such as described herein has all of the advantages resulting fromthe constructions described in our aforesaid companion applications, andalso has the various additional features 01": importance hereinbetoreparticularly described, chiei among which is l the ready manipulation ofthe parts and the making ot' the principal adjustments of the most vitalpoints oil the tool readily from a point wholly outside the. work.

ll hat we claim is:

1. A. tool at the class described, comprising); two main elements, oneof which is a cutter and its operating means, and the other of which isan associated cutter-bar having connected main and auxiliary sectionsshiitable to different relative angular positions, said cutter-barhaving means e2;- te'ziding from said auxiliary section to a point onthe main section outside the work for shiftingi; said :uutiliary sectionrelatively to the main section.

2. A. tool of the clas described, comprising two main elements, one ofwhich is a cutter and its operating means, and the other of which is anassociated cutter-bar having; main and auxiliary sections relativelymovable for varying the general direction of said cutter-bar withrespect to the cutter which is near the inner end of the tool, saidcutter-bar having means ere tending lengthwise of said main section froma point outside the work for shitting the auxiliary section relativelyto the main section.

A tool of the class described, comprisinn,- two main elements, one ofwhich is a cutter and its operating means, and the other of which is anassociated cutterbar having connected main and auxiliary sectionsshiitable to different relative angular POSitlOn-S, said cutter-barhaving means extending from said auxiliary section to a point on themain section outside the work for shitting said auxiliary sectionrelatively to the main section, said means embodying a slide.

at. A tool of the class described, comprising two main elements, one ofwhich is a cutter and its operating means, and the other of which is anassociated cutter-bar haidng connected main and auxiliary sectionsshittablc to different relative angular positions, said cutter barhaving a screwteed device extending to a point outside the work forshifting said auxiliary section relatively to said main section.

5. A tool of the class described, comprising two main elements, one ofwhich is a cutter and its operating means, and the other of which is anassociated cutter-bar having: connected main and auxiliary sec tions thelatter 01 which is shittable to different positions crosswise of thecutter-bar, said cutter-bar having means on the main section andextending outside the zone of.

the work for shifting said auxiliary section to said positions.

6. A tool of the class described, comprising two main elements, one ofwhich is a cutter and its operating means, and the other of which is anassociated cutter-bar having connected main and auxiliary sections thelatter of which is shiftable to different positions crosswise of thecutter-bar, said cutter-bar having means on the main section lyingwithin the opposite faces of the same for shifting said auxiliary,section to said positions, and means for operating said shifting means.

I 7. A tool of the class described, comprising two main elements, one ofwhich is a cutter and its operating means, and the other of which is anassociated cutter-bar having connected main and auxiliary sections thelatter of which is shiftable to different positions crosswise of thecutter-bar, said cutter-bar having means on the main section lyingwithin the opposite faces of the same for shifting said auxiliarysection to said positions, and means for operating said shifting meansand holding it in its various positions.

8. A tool of the class described, comprising two main elements,one ofwhich is a cutter and its operating means, and the other of which is anassociated cutter-bar having connected main and auxiliary sectionsshiftable to different relative angular positions, a slide on the mainsection for shifting the auxiliary section relatively to said mainsection, and a screw-feed associated with said slide at a point outsidethe work for operating said slide.

9. A tool of. the class described, comprising two main elements, one ofwhich is a cutter and its operating means, and the other of which is anassociated cutter-bar having connected main and auxiliary sectionsshiftable to different relative angular positions, a slide extendingsubstantially from the outer end of said main section to the auxiliarysection for shifting the latter relatively to the former, and ascrew-feed associated with said slide at the outer end thereof foroperating the same.

10. A tool of the class described, comprising two main elements, one ofwhich is a cutter and its operating means, and the other of which is anassociated cutter-bar having connected main and auxiliary sections thelatter of which is shiftable to different positions crosswise of thecutter-bar, a slide on the main section and lying within the oppositefaces thereof for shifting the auxiliary section to said positions, andmeans on the main section outside the work for operating said slide. 7

11. A tool of the class described, compristwo main elements, one ofwhich is a cutter and its operating means, and the other of which is anassociated cutter-bar having pivotally connected main and auxiliarysections, and a slide on the main section having means for convertingthe move ment thereof into a swinging movement of said auxiliary section12. A tool of the class described, comprising two main elements, one ofwhich is a cutter and its operating means, and the other of which is anassociated cutter-bar having pivotally connected main and auxiliarysections, and a slide on the main section having means within theopposite faces thereof for converting the movement of the slide into aswinging movement of said auxiliary member.

13. A tool of the class described, comprising two main elements, one ofwhich is a cutter and its operating means, and the other of which is anassociated cutter-bar having pivotally-connected main and auxiliarysections, a slide 011 the main section having means for converting themovement thereof into a swinging movement of said auxiliary member, anda screw feed connecting said slide and the outer end of said mainsection.

1%. A tool of the class described, comprising two main elements, one ofwhich is a cutter and its operating means, and the other of which is anassociated cutter-bar having a main member and a yoke pivotallyconnected thereto at opposite edges thereof, a slide-frame on the mainsection having means for converting the sliding movement of said frameinto a swinging movement of the yoke, and a screwfeed for saidslideframe.

15. A tool of the class described, comprising cutter, an associatedcutter-bar having a main member and a yoke pivotally connected theretoat opposite edges thereof, a slide-frame on the main section lyingsubstantially within the opposite faces thereof and having means betweensaid faces for converting the sliding movement of said frame into aswinging movement of the yoke, and a screwfeed for said slide-frame.

16. A tool of the class described, comprising two main elements, one ofwhich is a cutter and its operating means, and the other of which is acutter-bar, a pivotal connection between said cutter and cutter-bar oneelement of which is carried by the latter, and means on the cutter-barand extending outside the zone of the work for shifting said pivotalelement.

17. A tool of the class described, comprising two main elements, one ofwhich is a cutter and its operating means, and the other of which is acutter-bar, a pivotal connection between said cutter and cutter-bar oneelement of which is carried by the latter, and means on the cutter-barand extending outside the zone of the work for shifting said pivotalelement lengthwise of the cutter-bar.

18. A tool of the class described, comprising a cutter, a cutter-bar, apivotal connection between said cutter and cutter-bar one element ofwhich is carried by the latter,

ing a cutter, a cutter-bar, a pivotal connection between said cutter andcutter-bar one element of which is carried by the latter, and afeed-screw extending from a point outside the zone of the work forshifting said pivotal element lengthwise of the cuttor-bar.

20. A tool of the class described, comprising a cutter, a lever, apivotal connection between said cutter and lever one element of which iscarried by the latter at the loadpoint, and means on said lever andextending outside the zone of the work for shifting said pivotal elementand load-point.

21. A tool of the class described, comprising two main elements, one ofwhich is a cutter and its operating means, and the other of which is alever having main and auxiliary sections, a pivotal connection betweensaid cutter and the main section of said lever one element of which iscarried by said main section, and means on said main sec tion andextending outside the zone of the work for shifting said pivotalelement.

22. A tool of the class described, comprising two main elements, one ofwhich is a cutter and its operating means, and the other of which is alever having main and auxiliary sections, a pivotal connection betweensaid cutter and the main section of said lever one element of which iscarried by said main section, and means on said main section andextending outside the zone of the work for shifting said pivotal elementlengthwise of said main section.

23. A tool of the class described, co1nprising a cutter, a lever havingmain and auxiliary sections, a universal connection between said cutterand the main section of the lever one element of which is carried bysaid main section at a point between the ends of said auxiliary section,and means on said main section and extending outside the zone of thework for shifting said element of the universal connection to difierentpositions between the ends of said auxiliary section.

24. A tool of the class described, co1npris ing a cutter, a leverembodying a main section and a yoke pivotally connected therewith intowhich the main section of the le ver extends, a universal connectionbetween said cutter and the main section of the lever one element ofwhich is carried by said main section at a point between the ends ofsaid yoke, and means on said main section and extending outside the zoneof the work for shifting said element of the universal connection todiflerent positions between the ends of said yoke.

25. A tool of the class described, comprising a cutter, a leverembodying a main section and a yoke pivotally connected therewith intowhich the main section of the lever extends, a universal connectionbetweensaid cutter and the main section of the lever one element ofwhich is carried by said main section at a point between the ends ofsaid yoke, and means on said main section and embodying a feed-screwextending to the upper end thereof for shifting said element of theuniversal connection to difierent positions between the ends of theyoke.

26. A tool of the class described, com prising a cutter, a cutter-bar, apivotal connection between said cutter and cuttenbar, a slide on thecutter-bar carrying one ele ment of said connection, and a teed-screwextending from said slide to the upper end of said cutter-bar.

27. A tool of the classdescribed, comprising a cutter, a lever havingmain and auxiliary sections, a pivotal connection between said cutterand the main section of said lever, a slide on said main sectioncarrying one element of said connection, and a feed-screw on said mainsection extending from said slide to the upper end of said section.

28. A tool of the class described, comprising a cutter, an associatedcutter-bar having connected main and auxiliary sec tions the latter ofwhich is shiftable to different positions crosswise of the cutter-bar, apivotal connection between said cutter and the main section of saidcutter-bar, a pair of slides on said main section one of which carriesone element of said pivotal connection and the other of which isoperative for shifting said auxiliary section to said positions, andmeans carried by said main section outside the zone of the work forshifting said slides.

29. A tool of the class described, comprising a cutter, a lever havingpivotally connected main and auxiliary sections, a pivotal connectionbetween said cutter and the main section of said lever, a pair of slides011 said main section one of which carries one element of said pivotalconnection and the other of which is operative for shifting saidauxiliary section to different angular positions, and means carried bysaid main section outside the zone of the work for shifting said slides.

30. A tool of the class described, comprising a cutter, an associatedcutter-bar having connected main and auxiliary sections the latter ofwhich is shiftable to different positions crosswise of the cutter-bar, apivotal connection between said cutter and the main section of saidcutter-bar, a pair of'slides on said main section one of which carriesone element of said pivotal connection and the other of which isoperative for shifting said auxiliary section to said positions, and apair of feed-screws carried by said main section and connectedrespectively with said slides.

31. A tool of the class described, comprising a cutter, an associatedcutter-bar having connected main and auxiliary sections the latter ofwhich is shiftable to different positions crosswise of the cutter-bar, apivotal connection between said cutter and the main section of saidcutter-bar, a pair of slides on said main section one of which carriesone element of said pivotal connection and the other of which isoperative for shifting said auxiliary section to said positions, and apair of feed-screws carried by said main section and connectedrespectively with said slides and extending to the opposite end of saidmain section.

82. A tool of the class described, comprising a cutter, an associatedcutter-bar having connected main and auxiliary sec tions the latter ofwhich is shiftable to different positions crosswise of the cutter-bar, apivotal connection between said cutter and the main section of saidcutter-bar, a pair of slides on said main section one of which carriesone element of said pivotal connection and the other of which isoperative for shifting said auxiliary section to said positions, and apair of concentric feedscrews carried by said main section and connectedrespectively with said slides.

33. A tool of the class described, com-, prising a cutter, a leverhaving main and auxiliary sections, a pair of slides on said mainsection near opposite ends thereof and carrying respectively the powerand load points of said lever, and a feedscrew on said main sectionconnected to the slide carrying said load-point and passing freelythrough a bore in the slide carrying said power-point.

34. A tool of the class described, comprising a rotary cutter, and acutter-bar pivotally associated therewith near one of its ends andextending in a general direction transverse to the cutting axis andhaving means near its other end for shifting the position of saidcutting axis relative to the cutter-bar.

35. A tool of the class described, comprising a rotary cutter, and acutter-bar pivotally associated therewith near one of its ends andextending in a general direction trans verse to the cutting axis andhaving means of said cutting axis in a plurality of direc' tionsrelatively to the adjacent end of said cutter-bar.

36. A tool of the class described, comprising a rotary cutter, a leverpivotally associated therewith at its load-point, and means adjacent tothe power-point of said lever for varying the relative positions of theload-point and fulcrum.

37. A tool of the class described, comprising a rotary cutter, a leverpivotally associated therewith at its load-point, and means adjacent tothe power-point of said lever for varying the relative positions of theload-point and fulcrum lengthwise of the lever.

38. A tool of the class described, comprising a rotary cutter, a leverpivotally associated therewith at its load-point, and means adjacent tothe power-point of said lever for varying the relative positions of theload-point and fulcrum lengthwise and crosswise of said lever.

39. A tool of the class described, com prising a rotary cutter and itsoperating means, a cutter-bar, and a pivotal connection between saidcutter and cutter-bar and embodying an adjustable bearing elementcarried by one of said members.

A0. A tool of the class described, comprising a rotary cutter and itsoperating means, a cutter-bar, and a universal connection between saidcutter and cutter-bar and embodying an adjustable connecting elementcarried by one of said members and having two main parts adjustable todif ferent relative longitudinal positions and the maximum adjustedlength of which is greater than that of either part.

41. A tool of the class described, comprising two associated mainmembers one of which has a cutter and its operating means, and a pivotalconnection between said members and embodying a telescopic bearingelement carried by one of said members for varying the distance betweensaid members.

42. A tool of the class described, .comprising two associated mainmembers one of which has a cutter, and the other of which is acutter-bar embodying main and auxiliary sections having a relativetransverse movement, and a pivotal connection between said cutter andthe main member of the cutter-bar said connection embodying a telescopicbearing element for varying the distance between said connected members.

43. A tool of the class described, comprising two associated mainmembers one of which has a cutter and one of which carries a shiftableelement of a pivotal connection for said members, and means on that mainmember by which said shiftable element of the pivotal connection iscarried for adjusting said shiftable element to different positions froma point near the outer end of the tool.

44:. A tool of the class described, comprising two associated mainmembers one of which has a cutter movable about an axis transverse tothe tool and also has cutter-operating means and the other of which is acutter-bar having at the end near the cutter a movable element shiftableto different positions from a point near the opposite end of the tool.

1-5. In a tool of the class described, a relatively long cutter-bartransverse to the cutting axis of the tool and having near its workingend a movable elen'ient shiftable to different positions at the extremeworking end of said tool from a point near the opposite end of the tool.

16. A tool of the class described, comprising two associated mainmembers each of which has near the Working end thereof a movableele1nentone of which is a cutterand each of which is disposedtransversely to the axis of the cutter and has near its opposite endmeans for shifting said movable element one of said main members beingthe cutter and its operating means.

17. In a tool of the class described constructed to engage and workbetween two opposed resistance points, a pivotally movable cutter bar, acutter pivoted thereon, said cutter bar having its pivot point arrangedto engage one of the resistance points and being movable to vary thedistance of the pivot point of the cutter from one of the resistancepoints, and means outside the zone of the cutter for shifting the pivotpoint of the cutter bar.

Signed by me, said THOMAS E. WILLIAMS at Orange, in the county ofFranklin and State of Massachusetts, this 23d day of December A. D.1914.

THOMAS B. WILLIAMS.

Witnesses FRED A. DEXTER, SIDNEY J. Wi-n'rn. Signed by me, the saidFRANK L. SMITH at Chicago, in the county of Cook and State of Illinois,this fourth day of January A.

FRANK L. SMITH. Witnesses Gno. H. ST. CLAIR, N. W. HOPKINS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. C.

